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GM Transmission Governor Gears

Q.
I have a 350 turbo transmission, I don't know what year pre lock-up. What I need to know is how many governor gears are ther for this transmission?I have check four or five used ones that I have and the gears are to big. Everyone tells me something is wrong all the gears for the 350 are the same. Can you Help me find the right gear or the problem?

Thanks,
Harry

A. I'm pretty sure the gears are the same. They used to change springs to control shift speeds. You didn't mention exactly what the problem is. If it's shifting too soon or too late...you may want to install a adjustable vacuum modulator. There is a small screw inside the vacuum port that can be turned in or out to adjust timing of shifts.